WordPress function undefined when adding a shortcode

Question

We would like to add a custom function of a shortcode in wp_include/functions.php.

This is the function:

function url_id() {
 
    $apiUrl = 'https:exampleurl.api.com/exemple123';

    $response = wp_remote_get($apiUrl);

    return wp_remote_retrieve_body($response);

}
add_shortcode('session_id', 'url_id');

But we were getting this error:

There has been a critical error on this website. Learn more about troubleshooting WordPress.

After reading some more troubleshooting documentation we added these two lines in wp-config:

define( 'WP_DEBUG', true );

define( 'WP_CACHE', true );

And after that we are getting this error:

Fatal error: Uncaught Error: Call to undefined function add_shortcode() in /home/c1624672c/public_html/woo/wp-includes/functions.php:18 Stack trace: #0 /home/c1624672c/public_html/woo/wp-settings.php(111): require() #1 /home/c1624672c/public_html/woo/wp-config.php(104): require_once('/home/c1624672c...') #2 /home/c1624672c/public_html/woo/wp-load.php(50): require_once('/home/c1624672c...') #3 /home/c1624672c/public_html/woo/wp-blog-header.php(13): require_once('/home/c1624672c...') #4 /home/c1624672c/public_html/woo/index.php(17): require('/home/c1624672c...') #5 {main} thrown in /home/c1624672c/public_html/woo/wp-includes/functions.php on line 18

There has been a critical error on this website. Learn more about troubleshooting WordPress.

Kirk Beard · Accepted Answer · 2021-09-04 11:41:43Z

0

If you want to add custom shortcodes to your website, that can be done via a custom plugin, or in your theme (as I suspect you're trying to do).

Instead of editing wp-includes/functions.php, add your code to wp-content/themes/<name-of-your-theme>/functions.php.

You should never edit the core files of WordPress, which includes all files in /wp-admin and /wp-includes. When you upgrade WordPress in the future, these files will be overwritten, and you'll lose any changes you've made.

The error message occurs because you're attempting to use the add_shortcode() function before WordPress has fully loaded, and defined all available functions.

edited Sep 4, 2021 at 11:41

answered Sep 4, 2021 at 11:36

Kirk Beard

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Comments

Anjan · Accepted Answer · 2021-12-24 06:18:47Z

0

Please change the shortcode parameter session_id because session_id predefined function in wordpress see the blow or your code

add_shortcode('session_id', 'url_id');

But right code will be work when you change the session_id.

answered Dec 24, 2021 at 6:18

Anjan

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